I have a pontoon boat in rabbit branch on Logan Martin. We have caught plenty of crappie in the spring time around docks and other structure, but I here about people catching tons of them at night during the summer, in 20 feet of water. How do you know where to fish? Surely, there is some type of underlying structure they are fishing, right?

Treetops in deep water. Finding the creek channels and locating structure in the bends of the channels. Use your graph if you have one.

Never fished Martin, but I have had success fishing bridge pillings closest to the channel in other lakes.

I grew up in that area, we would tie up under a bridge, most commonly Clear Creek, put out lanterns and fish with minnows all night. Some nights we would load the boat.

Up around powell's hide away is good along with clear creek

Under the Clear Creek Bridge.